C -
Approved standards

The current standard for Programming Language C (C11)
is ISO/IEC 9899:2011, published 2011-12-08.
Technical Corrigendum 1 (ISO/IEC 9899:2011/Cor. 1:2012) was published in 2012.

Published ISO and IEC standards can be purchased from a member body of ISO or IEC.

The latest publically available version of the C11 standard is the document
WG14 N1570, dated 2011-04-12. This is
a WG14 working paper, but it reflects what was to become the standard at the
time of issue.

The previous standard for Programming Language C (C99)
is ISO/IEC 9899:1999, published 1999-12-01.

Technical Corrigendum 3 (ISO/IEC 9899:1999 Cor. 3:2007(E)) was published in 2007.
It can be obtained free of charge from ISO.

The latest publicly available version of the C99 standard is the
combined C99 + TC1 + TC2 + TC3, WG14 N1256, dated 2007-09-07. This is
a WG14 working paper, but it reflects the consolidated standard at the
time of issue.